RE: [Algorithms] (Multi Layer Terrain) Triangle strips for "br oken" square patches

[Cem C. <cce...@nv...>]

About NvTriStrip:

I had actually fixed these memory leaks some time ago, but the change never
made it out to the website.  Sorry about that.

It's now been updated with the latest version:

http://developer.nvidia.com/object/nvtristrip_library.html

See the "NVTriStrip Library with Source" link.

thanks,
-Cem

--
Cem (pronounced "Jem") Cebenoyan
Software Engineer, Developer Relations
NVIDIA Corporation
> -----Original Message-----
> From: Alen Ladavac [mailto:ale...@cr...] 
> Sent: Sunday, February 15, 2004 1:38 AM
> To: gda...@li...
> Subject: Re: [Algorithms] (Multi Layer Terrain) Triangle 
> strips for "broken" square patches
> 
> 
> We did report both the leaks and the performance. They said 
> they'll fix it. But in the mean time, I thought it would be 
> useful to let people know it leaks memory, so they don't have 
> to find out the hard way (like we did :/).
> 
> I don't think we'll go with fixing the source code for 
> nvtristrip ourselves (especially since it uses stl - sic! :) ).
> 
> But, I've been thinking of this idea of using just 
> cache-coherency improvements, instead of full stripping. Now 
> that it was mentioned again, it got me thinking of it again. 
> I recently found a paper titled "Universal Rendering 
> Sequences for Transparent Vertex Caching of Progressive 
> Meshes" by Alexander Bogomjakov and Craig Gotsman.
> (http://www.cs.technion.ac.il/~gotsman/caching/) It is very 
> similar to what Tom Forsyth suggested with space-filling 
> curves, just that this works for general meshes. Has anyone 
> tried something like that?
> 
> Alen
> 
> 
> 
> ----- Original Message -----
> From: "Gary McTaggart" <ga...@va...>
> To: <gda...@li...>
> Sent: Friday, February 13, 2004 19:05
> Subject: RE: [Algorithms] (Multi Layer Terrain) Triangle 
> strips for "broken" square patches
> 
> 
> We use NVTristrip for preprocessing to generate cache 
> friendly trilists. I wouldn't spend much more effort on 
> tristripping than that if you can live with the time that it 
> takes to process your data.  If there are leaks in their 
> code, I believe that you can download the source code for it, 
> or better yet, talk to Nvidia and get them to fix it.  They 
> are pretty good about fixing their tools if they are broken.  
> Of course, if you are trying to strip at runtime, then you'll 
> probably want to find something else.
> 
> Gary
> 
> > -----Original Message-----
> > From: gda...@li...
> > [mailto:gda...@li...] On Behalf Of 
> > Ivan-Assen Ivanov
> > Sent: Friday, February 13, 2004 5:19 AM
> > To: gda...@li...
> > Subject: RE: [Algorithms] (Multi Layer Terrain) Triangle strips for 
> > "broken" square patches
> >
> > > Actually, nvtristrip produces great results, but there is 
> one  more 
> > > problem with it (apart from the slowness), at that is 
> memory leaks. 
> > > Seems it doesn't free some of its buffers sometimes. We
> > actually had
> > > to disable it in order to enable batch preprocessing at all. 
> > > Otherwise, we cannot process a large list of meshes at
> > once, because
> > > we run out of memory. :/ I would be happy to find out that
> > the problem
> > > is on our side, but after some time checking, we couldn't
> > find anything. Are you sure it works ok for you?
> >
> > I was JUST finishing a long whiney message along the lines of "is 
> > nvtristrip leaking like a sieve, or am I an idiot?". Whew, glad to 
> > find out that maybe after all it's not me :-)
> >
> > NVTriStrip is slow, but it leaks so many small blocks, that 
> it takes 
> > more time for our debug memory manager to print out the leak alerts 
> > than for the actual stripification...
> >
> >
> >
> >
> > -------------------------------------------------------
> > SF.Net is sponsored by: Speed Start Your Linux Apps Now. Build and 
> > deploy apps & Web services for Linux with a free DVD 
> software kit from 
> > IBM. Click Now! 
> http://ads.osdn.com/?ad_id=1356&alloc_id=3438> &op=click
> > 
> _______________________________________________
> 
> > GDAlgorithms-list mailing list
> > GDA...@li...
> > https://lists.sourceforge.net/lists/listinfo/gdalgorithms-list
> > Archives:
> > http://sourceforge.net/mailarchive/forum.php?forum_id=6188
> >
> >
> 
> 
> -------------------------------------------------------
> SF.Net is sponsored by: Speed Start Your Linux Apps Now.
> Build and deploy apps & Web services for Linux with
> a free DVD software kit from IBM. Click Now! 
> http://ads.osdn.com/?ad_id56&alloc_id438&op=click
> 
> _______________________________________________
> GDAlgorithms-list mailing list GDA...@li...
> https://lists.sourceforge.net/lists/listinfo/gdalgorithms-list
> Archives: http://sourceforge.net/mailarchive/forum.php?forum_ida88
> 
> 
> 
> -------------------------------------------------------
> SF.Net is sponsored by: Speed Start Your Linux Apps Now.
> Build and deploy apps & Web services for Linux with
> a free DVD software kit from IBM. Click Now! 
> http://ads.osdn.com/?ad_id=1356&alloc_id=3438> &op=click
> 
> _______________________________________________
> 
> GDAlgorithms-list mailing list GDA...@li...
> https://lists.sourceforge.net/lists/listinfo/gdalgorithms-list
> Archives: http://sourceforge.net/mailarchive/forum.php?forum_id=6188
>